Continuity of the spectrum of norm-normal matrices
Michal Zajac (1978)
Mathematica Slovaca
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Displaying similar documents to “Perturbation theorems for Hermitian elements in Banach algebras”
Continuity of the spectrum of norm-normal matrices
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A Note on the Paper "Hermitian Operators on C(X, E) and Banach-Stone Theorem" by R.J. Fleming and J.E.Jamison.
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The Shirali-Ford theorem as a consequence of Ptak theory for hermitian Banach algebras
Maria Fragoulopoulou (2002)
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A simple application of Pták theory for hermitian Banach algebras, combined with a result on normed Q-algebras, gives a non-technical new proof of the Shirali-Ford theorem. A version of this theorem in the setting of non-normed topological algebras is also provided.